util: crib SWAP macro from freedreno

we have a bunch of copies across the tree, unify them.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36257>

src/intel/compiler/brw_opt_bank_conflicts.cpp

@@ -50,6 +50,7 @@
 
 #include "brw_shader.h"
 #include "brw_cfg.h"
+#include "util/macros.h"
 
 #ifdef __SSE2__
 
@@ -256,15 +257,6 @@ namespace {
 
 #endif
 
-/**
- * Swap \p x and \p y.
- */
-#define SWAP(x, y) do {                          \
-      __typeof(y) _swap_tmp = y;                 \
-      y = x;                                     \
-      x = _swap_tmp;                             \
-   } while (0)
-
 namespace {
    /**
     * Variable-length vector type intended to represent cycle-count costs for

src/intel/compiler/elk/elk_fs_bank_conflicts.cpp

@@ -50,6 +50,7 @@
 
 #include "elk_fs.h"
 #include "elk_cfg.h"
+#include "util/macros.h"
 
 #ifdef __SSE2__
 
@@ -256,15 +257,6 @@ namespace {
 
 #endif
 
-/**
- * Swap \p x and \p y.
- */
-#define SWAP(x, y) do {                          \
-      __typeof(y) _swap_tmp = y;                 \
-      y = x;                                     \
-      x = _swap_tmp;                             \
-   } while (0)
-
 namespace {
    /**
     * Variable-length vector type intended to represent cycle-count costs for